23 the-art photovoltaic cells, 2012). For every alternative solar cell technology however, a full design review would be needed to assess lifecycle effects on mass, cost, and emissions. • Servicer cost: The Aerospace Corporation’s survey of commercial offerings for in-space servicing, assembly, and manufacturing (ISAM) capabilities yielded a range of $75M-$750M, suggesting $100M may be possible in the next 15 years. • Learning curve: Manufacturing learning curves in other industries range from 108% to 54%, though 80-82% is most common (Aerospace, 2018). For satellite manufacturing, The Aerospace Corporation estimated learning curves after reviewing manufacturing industries, including satellite manufacturing (Meisl & Morales, 1994). • Hardware lifetime: The standard lifetime for GEO satellite hardware is currently 15 years. • EP orbital transfers to GEO: These maneuvers have been conducted for over a decade (Boeing, 2012), and first order delta v calculations with state-of-the-art performance suggest feasibility at scales required, though the mass and configuration may require further assessment. Figure 14. SBSP Systems Sensitivities Compared to Other Renewables
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